//loading效果组件
<template>
  <div class="loading-bg">
    <div :class="[witchClass == 'class1'?'class1':'class2','loadEffect']" :style="{marginTop: marginTop? marginTop : '50%'}">
      <span class="ld-span"></span>
      <span class="ld-span"></span>
      <span class="ld-span"></span>
      <span class="ld-span"></span>
      <span class="ld-span"></span>
      <span class="ld-span"></span>
      <span class="ld-span"></span>
      <span class="ld-span"></span>
    </div>
  </div>
</template>

<script>
  export default {
    name: 'Loading',
    props: ["marginTop","witchClass"]
  }
</script>

<style lang="less" scoped>
  .loading-bg{
    position: fixed;
    top:0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,.1);
    z-index: 999;
  }
  .class2 {
    position: absolute;
    top:50%;
    left: 50%;
    transform: scale(.5);
    margin-top: -50px;
    margin-left: -50px;
  }
  .class1 {
    position: relative;
    margin: 50% auto 0;
    top: -50px;
    transform: scale(.5)
  }
  .loadEffect {
    width: 100px;
    height: 100px;
    .ld-span {
      display: inline-block;
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: #67e7d5;
      position: absolute;
      animation: load 1.04s ease infinite;
    }
  }

  @-webkit-keyframes load {
    0% {
      -webkit-transform: scale(1.2);
      opacity: 1;
    }
    100% {
      -webkit-transform: scale(.3);
      opacity: 0.5;
    }
  }

  .loadEffect .ld-span:nth-child(1) {
    left: 0;
    top: 50%;
    margin-top: -10px;
    -webkit-animation-delay: 0.13s;
  }

  .loadEffect .ld-span:nth-child(2) {
    left: 14px;
    top: 14px;
    -webkit-animation-delay: 0.26s;
  }

  .loadEffect .ld-span:nth-child(3) {
    left: 50%;
    top: 0;
    margin-left: -10px;
    -webkit-animation-delay: 0.39s;
  }

  .loadEffect .ld-span:nth-child(4) {
    top: 14px;
    right: 14px;
    -webkit-animation-delay: 0.52s;
  }

  .loadEffect .ld-span:nth-child(5) {
    right: 0;
    top: 50%;
    margin-top: -10px;
    -webkit-animation-delay: 0.65s;
  }

  .loadEffect .ld-span:nth-child(6) {
    right: 14px;
    bottom: 14px;
    -webkit-animation-delay: 0.78s;
  }

  .loadEffect .ld-span:nth-child(7) {
    bottom: 0;
    left: 50%;
    margin-left: -10px;
    -webkit-animation-delay: 0.91s;
  }

  .loadEffect .ld-span:nth-child(8) {
    bottom: 14px;
    left: 14px;
    -webkit-animation-delay: 1.04s;
  }
</style>
